检索结果-内蒙古大学图书馆

BOUNDS ON LEAST-SQUARES 4-PARAMETER SINE-FIT ERRORS DUE TO HARMONIC DISTORTION AND NOISE

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 1995年第3期44卷 637-642页

作者： DEYST, JP SOUDERS, TM SOLOMON, OM SANDIA NATL LABS ALBUQUERQUENM US TECHNOL ADM NATL INST STAND & TECHNOLGAITHERSBURGMD

Least-squares sine-fit algorithms are used extensively in signal-processing applications, The parameter estimates produced by such algorithms are subject to both random and systematic errors when the record of input samples consists of a fundamental sine wave corrupted by harmonic distortion or noise, The errors occur because, in general,such sine-fits will incorporate a portion of the harmonic distortion or noise into their estimate of the fundamental, Bounds are developed for these errors for least-squares four-parameter (amplitude, frequency, phase, and offset) sine-fit algorithms, The errors are functions of the number of periods in the record, the number of samples in the record, the harmonic order, and fundamental and harmonic amplitudes and phases, The bounds do not apply to cases in which harmonic components become aliased.

关键词： DVD Audio Sinusoid harmonic order Noise Systematic errors harmonic components algorithms Bound Amplitude signal processing Harmonic distortion

来源：评论

学校读者我要写书评

暂无评论

Classification of digital modulation types

Classification of digital modulation types

引用

conference on advanced signal processing algorithms

作者： MARINOVICH, NM NELSON, D COHEN, L UMESH, S CUNY CITY COLL DEPT ELECT ENGNNEW YORKNY 10031

ISBN: (纸本)0819419222

We review the standard frequency domain methods for modulation classification as a baseline for comparison with new approaches. A new procedure based on the singular value decomposition of a particular data matrix is developed. This matrix has some very interesting properties that facilitate a solution of a difficult problem of QPSK versus MSK classification. Performance of the new method is assessed via simulations and compared against those in the published literature.

关键词： Modulation signal processing Phase shift keying signal to noise ratio Interference (communication) Error analysis Fourier transforms Silicon signal detection signal analyzers

来源：评论

学校读者我要写书评

暂无评论

Mixed-radix approach to incremental DFT refinement

Mixed-radix approach to incremental DFT refinement

引用

conference on advanced signal processing algorithms

作者： WINOGRAD, JM NAWAB, SH BOSTON UNIV DEPT ECSBOSTONMA 02215

ISBN: (纸本)0819419222

Incremental refinement algorithms can quickly produce approximate results and may then improve the quality of those results in subsequent stages of computation. They offer promise for the development of real-time systems whose performance degrades gracefully under diminishing hard deadlines. We present a new class of incremental refinement algorithms which employ mixed-radix signal representations for the calculation of successive approximations to the DFT. This class includes algorithms with a wide range of cost/quality tradeoff characteristics. This work generalized a previously reported class of algorithms which employ binary signal representations only. The mixed-radix formulation allows solutions of a given level of quality to be achieved using significantly fewer arithmetic operations in many instances. Under certain restrictions, these algorithms can also be implemented with no computational overhead using fixed-point binary hardware.

关键词： APPROXIMATE processing INCREMENTAL REFINEMENT algorithms SUCCESSIVE APPROXIMATIONS DISCRETE FOURIER TRANSFORM SHORT-TIME FOURIER TRANSFORM MIXED-RADIX NUMBERING SYSTEMS REAL-TIME SYSTEMS

来源：评论

学校读者我要写书评

暂无评论

Software system for parsing signal processing tasks over multiple heterogeneous processors

Software system for parsing signal processing tasks over mul...

引用

conference on advanced signal processing algorithms

作者： WARSHAWSKY, EH JRS RES LABS INC ORANGECA 92665

ISBN: (纸本)0819419222

A design automation toolset of great applicability to the signal processing system design community is described herein, the JRS NetSyn product. NetSyn provides facilities for building and maintaining libraries of reusable hardware and software parts. The NetSyn methodology supports hardware/software codesign and tradeoffs and the distribution of software functions to processing elements in accordance with selected optimization objectives. NetSyn utilizes VHDL, Ada, and ANSI C standard languages and related tools. It facilities software reuse by porting application systems to alternative architectures. The paper presents some of the underlying concepts of NetSyn and then describes the functionality of the toolset in some detail.

关键词： DESIGN AUTOMATION SYNTHESIS SIMULATION HARDWARE SOFTWARE CODESIGN

来源：评论

学校读者我要写书评

暂无评论

The grid Musical-signal processing System 21

The grid Musical-Signal Processing System

引用

21st International Computer Music conference, ICMC 1995

作者： Taylor, J. Schutz, B.F. Department of Physics and Astronomy University of Wales College of Cardiff Po Box 913 CardiffCF2 3YB United Kingdom

This paper introduces an interactive signal-processing environment called grid, grid allows the creation of complex arrays of signal-processing algorithms by simply choosing the desired units from a toolbox and wiring them together, grid's easy-to-use interface enables non-programmers to apply advanced signal-processing algorithms to musical analysis problems. © 1995 International Computer Music conference, ICMC Proceedings. All rights reserved.

关键词： signal processing

来源：评论

学校读者我要写书评

暂无评论

Interference suppression in UHF synthetic-aperture radar 2

Interference suppression in UHF synthetic-aperture radar

引用

conference on algorithms for Synthetic Aperture Radar Imagery II

作者： FERRELL, BH LORAL DEF SYST ARIZONA DIVLITCHFIELD PKAZ 85340

ISBN: (纸本)0819418404

Under advanced Research Prjects Agency (ARPA) sponsorship, Loral Defense Systems, Arizona has developed algorithms and techniques for suppressing radio frequency interference (RFI) in radar signals. These techniques use conventional signal processing elements in an unconventional manner to localize the RFI energy in a domain where it can be easily distinguished from radar returns and removed from the radar data with minimal effect on coherent radar signal image formation processing. Significantly improved synthetic-aperture radar (SAR) images have been obtained using these techniques. Flight tests of a Loral airborne SAR system operating from 500 to 800 MHz have provided the SAR data used to develop and refine these RFI suppression techniques.

关键词： SYNTHETIC-APERTURE RADAR SAR RADIO FREQUENCY INTERFERENCE RFI RADAR signal processing IMAGE FORMATION processing

来源：评论

学校读者我要写书评

暂无评论

Semi-definite programming for quadratically constrained quadratic programs

Semi-definite programming for quadratically constrained quad...

引用

conference on advanced signal processing algorithms

作者： OLKIN, J TITTERTON, P SRI INT APPL CONTROL & SIGNAL PROC GRPMENLO PKCA 94025

ISBN: (纸本)0819419222

We consider the linear least squares problem subject to multiple quadratic constraints, which is motivated by a practical application in controller design. We use the techniques of convex optimization, in particluar, interior-point methods for semi-definite programming. We reduce a quasi-convex potential function. Each iteration requires calculating a primal and dual search direction and minimizing along the plane defined by these search directions. The primal search direction requires solving a least squares problem whose matrix is composed of a block- Toeplitz portion plus other structured matrices. We make use of Kronecker products and FFTs to greatly reduce the calculation. In addition, the matrix updates and matrix inverses in the plane search are actually low-rank updates to structured matrices so we are able to further reduce the flops required. Consequently, we can design controllers for problems of considerable size.

关键词： Matrices Computer programming Actuators Sensors Convex optimization Software development algorithms Convolution Process control signal processing

来源：评论

学校读者我要写书评

暂无评论

Identification of a class of time-invariant and time-varying nonlinear systems under non-Gaussian excitation

Identification of a class of time-invariant and time-varying...

引用

conference on advanced signal processing algorithms

作者： RALSTON, JC ZOUBIR, AM BOASHASH, B QUEENSLAND UNIV TECHNOL SIGNAL PROC RES CTRBRISBANEQLD 4001AUSTRALIA

ISBN: (纸本)0819419222

We consider the identification of nonlinear systems when the excitation is a non-Gaussian process. Closed from expressions are found for a class of nonlinear time-invariant as well as for time-varying systems which are excited by stationary and nonstationary inputs, respectively. The nonlinear model used represents a subset of the Volterra series, judiciously chosen so that closed form expressions can be resolved for non-Gaussian inputs. Nonlinear coherence functions are also derived in closed form. Estimation issues are discussed. Two examples are given to illustrate the general results.

关键词： SYSTEM IDENTIFICATION NONLINEAR HAMMERSTEIN SERIES NON-GAUSSIAN TIME-VARYING NONSTATIONARY

来源：评论

学校读者我要写书评

暂无评论

High order statistics for sinusoid peak detection

High order statistics for sinusoid peak detection

引用

conference on advanced signal processing algorithms

作者： DROUICHE, K BENIDIR, M MOKKADEM, A ETIS/Univ. de Cergy Pontoise (France) Ecole Superieure d'Electricite and Univ. de Paris-Sud (France) Univ. de Paris-Sud (France)

ISBN: (纸本)0819419222

Detection and estimation of harmonic signals embedded in noise is one of the most encountered problems in the signal processing area. Much research has been done for solving such a problem regarding its importance in many applications. Second order statistics have been used extensively by many authors such as Whittle, Bartlett, Hannan, and Priestley. Each of them proposed a test for harmonic signal detection. However, most of these tests have been proposed under the Gaussina assumption. As a matter of fact, when the the noise is non- Gaussian, statistics of higher order could provide much more information. This is where this paper is directed. We particularly focus our attention on the third and fourth order cumulant methods. Statistical tests based on an extension of the existing tests are used and their efficiency analyzed and discussed.

关键词： HARMONIC signal CUMULANT FUNCTION POLYSPECTRUM HIGH ORDER STATISTICS SINUSOID PEACK DETECTION

来源：评论

学校读者我要写书评

暂无评论

AN APPLICATION-SPECIFIC PROCESSOR DEDICATED TO KALMAN-FILTER-BASED CORRECTION OF SPECTROMETRIC DATA

引用

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 1995年第3期44卷 720-724页

作者： BARWICZ, A MASSICOTTE, D SAVARIA, Y PANGO, PA MORAWSKI, RZ WARSAW UNIV TECHNOL FAC ELECTRINST RADIOELECTRPL-00665 WARSAWPOLAND ECOLE POLYTECH MONTREAL MICROELECTR RES GRPMONTREALPQ H03 C3ACANADA UNIV QUEBEC DEPT INGNMEASURING SYST LABTROIS RIVIERESPQ G9A 5H7CANADA UNIV QUEBEC SIGNALS & MEASUREMENTS LABTROIS RIVIERESPQCANADA

An application-specific processor dedicated to Kalman-filter-based measurand reconstruction in spectrometric applications is proposed, It is intended to act as coprocessor of a host processor, performing relatively sophisticated processing of measurement data subject to systematic errors of an instrumental type and to random errors of various natures, It is basically designed for improving the resolution of spectrometric measurements commonly used in environmental laboratories, but it may be useful in other applications where similar processing of measurement data is required, Examples of applications of the processor in spectrometric measurements, its metrological advantages and limitations, as well as perspectives of its development, are presented.

关键词： Application specific processors signal processing algorithms Digital signal processors Mass spectroscopy Instruments Velocity measurement Digital signal processing Very large scale integration Power system reliability Coprocessors

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：